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    • 2. 发明专利
    • JPS5333555B1
    • 1978-09-14
    • JP232169
    • 1969-01-10
    • C01B7/19C01B7/24C01B33/08C01B33/107C01D3/02C01B7/22C01B33/10
    • 1,239,646. Complex fluorides. G. L. FLEMMERT. 18 Dec., 1968 [12 Jan., 1968], No. 60157/68. Heading C1A. The composition of the solid complex fluorides sodium fluosilicate (into sodium fluoride and silicon tetrafluoride) and sodium bifluoride (into sodium fluoride and hydrogen fluoride) is effected by entraining particles of the complex fluoride, having an average particle diameter of less than about 1 mm., in a turbulent stream of preheated non-reactive gas at a Reynolds Number within the range 10 4 to 10 6 , heating at a temperature within the range 250-750‹ C. but below the softening temperature of sodium fluoride or the sodium fluoride/sodium fluosilicate eutectic mixture, and then separating the sodium fluoride and decomposition gases thereby obtained. If the complex fluoride is sodium fluosilicate, then the decomposition temperature is within the range 550‹ to 750‹ C.; if it is sodium bifluoride, then it is within the range 250‹ to 500‹ C. The complex fluoride may be brought to the decomposition temperature at least twice and held there for between 0À5 and 5 seconds. After decomposition the gaseous products may be recycled at least once and mixed with the non-reactive gas stream. In order to prevent plugging of the apparatus with solid material during operation, 10-20% of sodium fluoride or up to 5% of silica or up to 5% of carbon black may be mixed with the particles of complex kuoride. Apparatus is specified for carrying out the invention.
    • 7. 发明授权
    • Method for curtailing phosphorous impurity in the production of hydrogen
fluoride
    • 在氟化氢生产中减少磷杂质的方法
    • US4394365A
    • 1983-07-19
    • US331772
    • 1981-12-17
    • Bohdan Gnyra
    • Bohdan Gnyra
    • C01B7/19C01B7/22
    • C01B7/192
    • In the generation of hydrogen fluoride gas for the production of AlF.sub.3 by the reaction of fluorspar with concentrated sulphuric acid a small amount of aluminium sulphate is introduced into the reactive mix to assist in the retention of phosphorous compounds in the solid residues of the reaction and thus reduce the phosphorous content of the gaseous HF. Aluminium sulphate may be added as alum or may be generated in situ in the sulphuric acid by addition of an alumina hydrate, preferably before the acid is brought into contact with fluorspar. The addition of a small amount of calcium carbonate to the fluorspar also improves retention of phosphorous compounds in the solid residues in some instances.
    • 在通过氟石与浓硫酸反应生成AlF 3的氟化氢气体中,将少量的硫酸铝引入到反应混合物中以帮助将磷化合物保留在反应的固体残余物中 降低气态HF的磷含量。 可以将铝硫酸盐作为明矾添加,或者可以通过加入水合氧化铝在硫酸中原位生成,优选在与氟石接触之前。 在一些情况下,向氟石中加入少量碳酸钙还可改善固体残留物中磷化合物的保留。
    • 8. 发明授权
    • Pyrohydrolysis system for processing fluorine-containing spent and waste
materials
    • 用于处理含氟废料和废料的热解水解系统
    • US4158701A
    • 1979-06-19
    • US958061
    • 1978-11-06
    • John N. AndersenNorman Bell
    • John N. AndersenNorman Bell
    • C22B7/00C01B7/19C01F7/04C25C3/06C25C3/08C01B7/22
    • C01B7/191C01F7/04C25C3/08Y10S423/16
    • A pyrohydrolysis system is provided for the recovery of valuable components from waste and spent materials generated in electrolytic aluminum reduction facilities. The pyrohydrolysis system employs a dense phase fluidized bed reaction zone for the pyrohydrolysis of coarse feed, a dilute phase fluidized reaction zone for pyrohydrolyzing fine feed, this zone being superimposed and interconnected with the dense phase zone. The offgases, after removal of the solids, are contacted in a dilute phase fluidized zone, with a source of Al.sub.2 O.sub.3 to remove residual Na values and to produce Na-free HF. The solids from the first dilute zone, having a desired high Na:Al atom ratio, can be combined with the product clinker from the dense bed zone. The offgas, containing the source of Al.sub.2 O.sub.3, is subjected to solids separation, the solids-free and Na-free HF is utilized, while the solids of low Na:Al mole ratio are recycled to the residual Na conversion step.
    • 提供了一种热解系统,用于从电解铝还原设备中产生的废物和废弃材料中回收有价值的组分。 热水解系统采用致密相流化床反应区,用于粗饲料的热解,一种用于热分解精细饲料的稀相流化反应区,该区叠加并与稠相相互连接。 除去固体后,残留物在稀相流化区与Al 2 O 3源接触以除去残留的Na值并产生无Na的HF。 具有所需高Na:Al原子比的来自第一稀释区的固体可以与致密床区的产品熟料组合。 将含有Al 2 O 3源的废气进行固体分离,使用无固体和无Na的HF,而将低Na:Al摩尔比的固体再循环至残余的Na转化步骤。
    • 9. 发明授权
    • Cyano compounds as fuels for HF or DF lasers
    • 氰基化合物作为HF或DF激光的燃料
    • US4102988A
    • 1978-07-25
    • US838519
    • 1977-10-03
    • Pasquale MartignoniJames A. Murfree, Jr.William M. ChewOrval E. Ayers
    • Pasquale MartignoniJames A. Murfree, Jr.William M. ChewOrval E. Ayers
    • H01S3/095C01B7/22
    • H01S3/095
    • A cyano compound fuel selected from the group consisting of dicyanoacetylene (DCA), tetracyanoethylene (TCE), and tetracyanoethylene oxide (TCEO) when reacted with an oxidizer compound selected from the group consisting of fluorine (F.sub.2), nitrogen trifluoride (NF.sub.3), chlorine trifluoride (ClF.sub.3), chlorine pentafluoride (ClF.sub.5), and tetrafluorohydrazine (N.sub.2 F.sub.4) produces the F.sup.. atom concentration required for either HF or DF lasers. The reaction is accomplished in the presence of a diluent gas selected from nitrogen and helium. No deactivation species are among the gaseous species produced which include CF.sub.4, F.sup.. atoms, and N.sub.2 ; therefore, deactivation of the excited molecules, either HF or DF, which are responsible for the lasing in a HF or DF laser is prevented. A higher performance of the laser device can be achieved.
    • 当与选自氟(F2),三氟化氮(NF 3),氯(CH 3))的氧化剂化合物反应时,选自二氰基乙炔(DCA),四氰基乙烯(TCE)和四氰基亚乙烯氧化物 三氟化硫(ClF3),五氟化氯(ClF5)和四氟肼(N2F4)产生HF或DF激光器所需的F.原子浓度。 反应在选自氮和氦的稀释气体存在下完成。 所生产的气态物质中不包括CF4,F.原子和N2的失活物质; 因此,防止在HF或DF激光中负责激光的激发的分子HF或DF的失活。 可以实现激光装置的更高性能。